Dredger-pump.



F. H. JACKSON.

Patented Mar, 2, 1909.

2 SHBET8SHEET 1.

F. H. JACKSON.

DREDGER PUMP.

APPLICATION FILED MAR. 30, 190B.

Patented Mar. 2, 1909.

2 SHEETS-SHEET 2.

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FRANKLIN H. JACKSON, OF WEST BERKELEY, CALIFORNIA, ASSIGNOR 'lO BYRONJACKSON IRON WORKS, OF WEST BERKELEY. CALIFORNIA, A CORPORATION OFCALIFORNIA.

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Specification of Letters Patent.

Patented March. 2, 1909.

Application filed March 30, 1908. Serial No. 424,237.

To all whom it mag concern:

Be it known that I, FRANKLIN ll. JACK- SON, a citizen of the UnitedStates, residing at West Berkeley, in the county of Alameda and State ofCalifornia, have invented new and useful Improvements in Dredger-Pumps,of which the following is a specification.

My invention relates to improvements in centrifugal dredging pumps forpumping Water containing sand, gravel or other abrasive material, whichsoon cuts and wears impellers or runners on sides, wearing rings, andshell, to such an .extent as to render it unfit for further use, unlesssome means is provided to protect it against such abrasion and wear.

The object of my present invention is to provide a means whereby thearms of the impeller are so formed that solid bodies will not impinge orstrike projecting points of arms, but roll radially or outwardly throughports of impeller when same is in motion.

Another eb'eet is to so construct impeller liningblocks t at they may befirmly secured without exposed bolt heads, and also held againstcentrifugal force exerted when pump is in operation.

Afurther object is to rovide side liners which may be ofany har materialsuitable to resist abrasion, and which may be easily and cheaplyrenewed. And a further object being to form a boltless lining for pumpshells, which ma be made of suitable nonabrasive materia that can bemade in sections and laced in shell and firmlysecured without b ts,screws, or wedges.

A further object is to construct anim eller having but two arms or portsso forme that they will not clog with roots, grass or the like; andanother object, to so construct a combined water seal packing-box reliefchamber and relief ports, bearing and gland, that the same may be firmlysecured to the puin side.

Ot er objects will appear in the following description.

In the drawings-Figure 1 is a transverse longitudinal section of pumpembodying my present improvements, the plane of the sectioncorresponding with the axis of the pump suction. Fig. 2 is a perspectiveView of combined water seal packing box and bearing holder, showinggland studs and opening for packing. Fig. 3 is a pers ective inedbearing and gland s owing relief ports and stud holes. Fig. 4 is a faceview of impeller, showing wearing-blocks 5 in place, and relief ports inrun of impeller.

Fig. 5 is a side view of impeller partly in section, showing method ofsecuring wearingblocks in impeller side openings through which bolts forsaid lining blocks are secured, relief hole in rim of impeller andbalancing ports near hub of impeller to relieve pressure in backbalancing chamber. Fig. 6 is a view of a section of lining block at aline drawn through Fig. 7 at AB. Fig. 7 is a top View of said linerblock. Fig. 8 is a side view of shell partly in section, showing shellliners in place. Fig. 9 is a perspective view of shell liners.

The pump comprises essentially a shell 1, preferably made of cast iron,aninner lining 34, made of hard cast iron or steel in sections so thatsame may be inserted from inside center opening of shell, and held inplace by inwardly projecting annular flange 18 cast integral, with hardiron or steel side liners 2 and 2; said side liner having inwardlyprojecting annular flange 37 forming balance ring and guide to runner,and having shaft and suction opening in center. Side liners 2 and 2having outwardly projecting flanges at rims which set in counterbores oneither side of cast iron shell 1, and are held firmly in place byoutside cover plates 3 and 3 A rubber or other packing ring, is placedat points 31 and 32, which prevents leakage or circulation betweenliners 2 and 2*, and side plates 3 and 3 An impeller 35 mounted on ashaft 25 revoluble in bearings 23 and 24, such impeller having twohollow arms so recessed asto receive wearing blocks. 5 in working sideof said ports or arms, and thus forming two hollow arms in the form ofthe letter S, and having outwardly projecting annular flanges 36 oneither side, lined on the inside with renewable steel wearing rings 6securedto said flange with rivets 33, said wearing rings forming arunning joint with inner annular rojecting flanges 37 and 37*, castintegral Wit and part of side liner 2 and 2, said impeller havingcircular openin on one side and outwardly rojecting huon o posite sideto receive siaft 25, side wall in )ack of hub side of impellercontinuing to shaft 25; said wall having two ports 16 connecting chamber38 with ports 29 and 29 near center of runner, thus relieving saidchamber x 38 of any pressure that might cause the of the impeller arerecessed to receive wear ing, blocks 5, having pro ectin lugs 39 on theside towards center of impe ler, being so formed as to form a lock jointso that when the pum is in operation centrifugal force will ten to holdwearing blocks 111 place. The runner wearing blocks (Figs. 6 and 7) areso formed that the backs 39 interlock on the lugs 39 and also contains Tslot to receive head of holding bolts. The working face is convex to aline drawn radially from center of runner to circumference of same.

The center of the radii are at a between the outer diameter 0 suctionring and the periphery of said runner or im eller. The working face isalso concave to a me at right angles to a line drawn parallel with theshaft 25, so that the working face is similar to a half sheave cut at aline parallel with the shaft or axis of same.

The shell 1, shown partly in section in Fig. 8, has circular openings oneach side, and is counterbored to receive said liners 2 and 2*. Theshell liners, which are hard iron or steel, are made in section, asshown in Fig. 9, in which 34* is the discharge liner, having a portionof the circular liner cast integral with same, one end being cut at anangle to receive key section 34 of liner. 34 and 34' are similar; 34being so formed that one end matches. end of 34", and the other endmatches key section 34. All of said liners are held in working positionby the projecting annular flange 18, which is part of side liner 2 and 2Bolted to the shaft side of the pump is a combined bearing support 7consisting of an enlarged annular water-seal chamber 10 with the supplyport 9, and packing-box 22, and enlarged annular relief chamber 13 intowhich is tapped drain pipe 14. Also the combined bearing gland 8, linedpart of its length with bearing metal, and in the end of which, nearestthe pump, is an annular space larger than the shaft, with end nearestpacking chamber contracted nearly to shaft with relief holes 12 openinginto annular space 13. Thus, after packing is tightened by means of thestuds 15, (shown in perspective Fig. 2) the bearing is held rigidly bythe set screw 16, and should any water or gritty material escape fromthe water seal chamber point midway 10 through the packing 22,leitherwhile the g is standing or running, instead of going into ' cant thewater or grit will esca e into the annular space, thence through t erelief holes 12, space 13 and pipe 14.

The outside cover plates 3 and 3 have annular slots or channels ofdovetail form, made around that portion against which the flanges of thesuction 1pipe 20 and the bearing sup ort 7 abut, and t ese flanges aresecure to t rose of the cover. plates by bolts 21, the heads of whichare adjustably held in the annular slots. This allows the connectedparts to be turned and adjusted with relation to I each other as may bere ui'red. Nuts upon the outer ends of the bdlts secure the partstogether.

Having thus described my invention, what I claim and desire to secure byLetters Patent is- I 1. In a centrifugal pump, an outer shell, asectional lining fitting therein, and removable side liners havingannular flanges by which the lining is held in place.

2. In a centrifugal dred ing ump, a shell having a counterbored we 1, sie liners having outwardly projectin flan es at the rim, fitting thecounterbore wal of the shell, said liners converging outwardly towardthe center, and having inwardly projectin an: nular flanges contiguousto the center, orming balancing ring and guide tubes for the impeller,and side disks or covers exterior to said liners and bearingthereagainst.

3. In a centrifugal dred ing pump, an outer shell, a'sectional shelliner, side liners having rejecting annular flanges whereby the shelliner is held in place, said hners having outwardly projecting radialflanges fitting in counterbores of the pump shell.

4. In an apparatus of the character described, an outer shell havingcircular openings on either side eounterbored to form inwardly rojectingflanges, side liners having outwardly projecting radial flanges fittingthe recesses of the shell, and less in thickness than the depth of saidrecesses, disks or covers fitting over the liners and projecting intothe recesses, and packing-rings intervening between the liners and thecovers, and {neans for securing the covers to the side mers.

5. In an ap aratus of the character described, a shell aving a boltlesssectional lining, retaining side liners, means forming a suction inletat one end of the shell, a bearing at the opposite portion of the shell,a shaft journaled in said bearingsfifand a second bearing exteriorthereto, means for revolving the shaft, an impeller secured to the shaftwithin the pump she'll," an external sleeve' between said chamber andsaid box, said sleeve having an opening on one side for the introductionof packing, a semicircular space made larger than the stufiing-box, anoutlet from said space, the outer end of said sleeve forming acontinuous ring to receive and support the sleeve bearing, and means forsecuring said ring.

6. In a centrifugal pump of the character described, an impeller havinghollow arms, wearing blocks fitted thereto, hooked lugs projecting froma line drawn radially from the center of the impeller, said lugs havingbolt-holes, and wearing block bolts fitting therein.

7. In a pumping a paratus of the character described an impel ier havinghollow arms and projecting lugs, wearing blocks fitted to the impellerhaving working faces concaved to a line drawn parallel with the axis ofthe pump, and convex with relation to a line radial thereto, said blockshaving recesses or grooves adapted to form a lockjoint with theprojecting lugs and hollow arms of the impeller, and holding bolts, saidblocks having aT slot in the recess to receive the head of the holdingbolts.

In testimony whereof I have hereunto set my hand in presence of twosubscribing wit- HGSSGS.

FRANKLIN H. JACKSON. l Vitnesses i GEO. H. STRONG, CHARLES EDELMAN.

